<!DOCTYPE html>
<html>
  <head>
    <title>Events: keypress</title>
    <script src='jquery-1.11.1.min.js'></script>
  </head>
  <body>
    <h2>Press some keys</h2>
    <div id='result'></div>
    <script>
      $(document).keypress(function(event)
      {
        key = String.fromCharCode(event.which)

        if (key >= 'a' && key <= 'z' ||
            key >= 'A' && key <= 'Z' ||
            key >= '0' && key <= '9')
        {
          $('#result').html('You pressed: ' + key)
          event.preventDefault()
       }
      })
    </script>
  </body>
</html>
